Reversible fulcrum for trussed brake beams



Dec. 26, 1922.

P. L. MAHhER. REVERSIBLE FULGRUM FOR TRUSSED BRAKE BEAMS.

FILED OCT. 20 |919.

` the characteristics below described, is given 'such form aswill adapt it to the particularv section of compression member employed in the brake beam. For instance, it is given the so-called arrowhead form when they fulcrum is to be connected through the well known *clip 12 and bolt 12a to the angle form of compression member 18, as shown in Figures 1 to 3; or it may have its anchoring end .constructed with the standingform 11a when it is to be riveted to the web of a channel section 13a (Figures t); or it may be in the yform of yan embodied clip 11bv drawn tightly upon the y compression member by l5."

clip-bolt 12a l(Figures 5 and 6) when it is toembrace a `channel section 1321 or an ing bar or yoke 15 bent sharply across the ends-thereof, and with a perforation 16 in the cross bar thus formed to receive the swivel stud 17 'of the slot `member 1. The

swivel stud 17 isprovided with a head or flange 18 within the cross bar 15 of suiiicient `dimension to transmit the pull `through the foot-member 11 or 11a, to the compression member 13. `At the same time swivel 17 permits angular dis-placement of the slot member 1 about its longitudinal'axis relatively to the foot-member 11 or 11a.

lVhen heldby the bolt1221 from the clip 12,` as iny Figure 1, or bythe rivets 12b from another formof compression member, asv

suggested in Figure Il, thefoot-member 11 or 11a is anchored to the compression member at points in the line of its straight sides 14 so'that the strains are all distributed in lines that will avoid distortion ofthe foot member. l l

The swivel studs 8 and 17, and especially the latter, having their flanges forgedy upon the ends thereof, are preferably pressed inv v the directionof the aXis of the fulcrum so as' i to bring their flanges, as well as the opposing faces of the memberswhich carry,them,j into firm bearing upon the yokes or crossbars f1 and 4a," and thereby avoid all lost motion or vibration between these parts. The

connection between the slot member 1 and Y the foot-member 1-1 or 11u, like that at-the outer end of the fulcrum, by reason of its form and the material of-which thev parts are "constructed requires but a relatively short longltudinal dimension for the necessary strength and stability of the parts, and thus leaves ample length of lever slot. j

,-ltlis to be noted that as the arrowhead ``form fitsk in the 'angle,13,` or as the outturned extensions of the foot-member 11aL are riveted tothe compression member, the side wallsli of the foot member are fixed against yment'with said side walls 1li. Moreover, in

laterall displacement, and the connection through which pull isimposed Vupon the compression member by the rivets of Figure l and by the bolt 12a of Figure 1 is in aline- Figure 1, the bolt 12a assists in holding the side walls against `lateral displacement.

Preferably, there' will be associated with one of the swivel joints, for instance, the joint at the head of the fulcrum, means for 7 limiting angular movement of the body member relatively to' the head and foot members, "This may be either the lugs 19 on the front end vof the body member entering segmental recesses 20 in the rear face `ofthe head block as shown in Figure 3,

.and head and foot members having swivel connections therewith, said body member being constructed of rolled structural steel fashioned to provide straight parallel side bars and end walls extending' perpendicularly thereto and integrally uniting the same, said foot member being also constructed ofrolled structural steel fashioned to pro 95 vide a portion for coacting with the compression member and a transverse end wall swivelly connected to the end wall of the body member, 4the compression being transmitted from said foot member longitudinally upon said side bars substantially inv direct alinement therewith' at all angular adjustments of said foot member. *1

2. An angularly adjustable slotted brake beam fulcrum, comprising a body lmember and end members having swivel connections therewith; said body member being con-` structed of rolled structural steel fashioned to provide straight parallel side'bars of parallelogram section, and end walls extending 11-0l at right angles thereto, integrally uniting the same and -providing flat yinner and outer faces perpendicular to said bars; an end member being in flat bearing upon an outer perpendicular face of an end wall; and the swivel thereof being' carried by said end member having a fiat headlirmly pressed against the inner flat face of lsaid end wall.

3. 'An `angularly adjustable slotted brake `beam fulcrum,` comprising a body member and end members having swivel connections therwith, said body member being constructed of rolled structural steel fashionedto providestraight parallel side bars and end walls extending at right angles thereto, integrally uniting the same and providing at outer bearing faces perpendicular to said bars, an end member having a surface inflat bearing engagement with one of said flat outer bearing faces` and swivelly connectedA with the adjacent end Walh the compressive force excrted through said end member being transmitted upon said side bars substantially in direct alinement therewith at all angular adjustments ot said end memberl` 4l. An angularly adjustable slotted brake beam tulorum, comprising a body member and head and foot members having swivel connections therewith; said body member being constructed ot rolled structural steel ol? rectangular section :fashioned to provide strzitight parallel side barsLand end Walls extending perpendicularly thereto and integrally uniting the same; and said toot member being also constructed of rolled structural steel fashioned to provide straight side Walls adapted to aline With the side bars of the body portion and with a transverse end Wall integrally uniting the same and united with an end wall oi the body member through its swivel connection.

5. An angularly adjustable slotted brake beam iulcrum7 comprising a body member and head and :toot members having swivel connections therewith; said body member being constructed of rolled structural steel ot rect-angular section fashioned to provide straight parallelside bars, and end Walls eX- tending perpendicularly thereto and integrally uniting' the same; said foot member being also constructed of rolled structural steel :fashioned to provide straight side walls adapted to aline with the side bars of the body portion and with a transverseend Wall integrally uniting the same and united with an end Wall of the body member through its swivel connection; and said foot member having means t'or tying together against lateral spreading its said side Walls.

6. ln an angularly adjustable iiulcrum for brake beams, a forged metal slotk member having substantially straight sides With a connecting yolie7 and a foot member constructed with substantially straight sides eX- tending in the direction of transmission of pull Yfrom the compression member, and connected by a cross bar having swivel connec" tion with the link member; said toot member having means sustaining its side Walls against lateral displacement; said lastnamed means comprising the bearings through which the foot member meets the compression member.

7. ln an angularly adjustable tulcrum for bra-lie beams, a forged metal slot member having substantially straight sides with a connecting yoke, and a foot member constructed with substantially straight sides extending in the direction of transmission of pull from the compression member' and connected by a cross bar having swivel connection with the link member; said foot member having means sustaining its side Walls against lateral displacement; said lastnamed means comprising the bearings through which the toot member meets the compression member; and a transverse bolt tying the side Walls ot the foot member t0- gether.

Signed at Chveland7 Ohio, this jlith day ot lctober, 1.919. i

` PETER L. lldAHlER. 

